source: trunk/j/src/org/armedbear/lisp/dotimes.lisp @ 11391

Last change on this file since 11391 was 11391, checked in by vvoutilainen, 13 years ago

ABCL license is GPL + Classpath exception. This was intended
by Peter Graves, the original author. For reference, see
http://sourceforge.net/mailarchive/forum.php?thread_name=20040721115302.839%40prufrock&forum_name=armedbear-j-announce

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.1 KB
Line 
1;;; dotimes.lisp
2;;;
3;;; Copyright (C) 2004-2005 Peter Graves
4;;; $Id: dotimes.lisp 11391 2008-11-15 22:38:34Z vvoutilainen $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19;;;
20;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
31
32(in-package #:system)
33
34(defmacro dotimes ((var count &optional (result nil)) &body body)
35  (multiple-value-bind (forms decls) (parse-body body nil)
36    (let ((index (gensym "INDEX-"))
37          (top   (gensym "TOP-")))
38      (if (numberp count)
39          `(block nil
40             (let ((,var 0)
41                   (,index 0))
42               (declare (type (integer 0 ,count) ,index))
43               (declare (ignorable ,var))
44               ,@decls
45               (when (> ,count 0)
46                 (tagbody
47                  ,top
48                  ,@forms
49                  (setq ,index (1+ ,index))
50                  (setq ,var ,index)
51                  (when (< ,index ,count)
52                    (go ,top))))
53               (progn ,result)))
54          (let ((limit (gensym "LIMIT-")))
55            ;; Annotations for the compiler.
56            (setf (get limit 'dotimes-limit-variable-p) t)
57            (setf (get limit 'dotimes-index-variable-name) index)
58            (setf (get index 'dotimes-index-variable-p) t)
59            (setf (get index 'dotimes-limit-variable-name) limit)
60            `(block nil
61               (let ((,var 0)
62                     (,limit ,count)
63                     (,index 0))
64                 (declare (ignorable ,var))
65                 ,@decls
66                 (when (> ,limit 0)
67                   (tagbody
68                    ,top
69                    ,@forms
70                    (setq ,index (1+ ,index))
71                    (setq ,var ,index)
72                    (when (< ,index ,limit)
73                      (go ,top))))
74                 (progn ,result))))))))
Note: See TracBrowser for help on using the repository browser.